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    Home > Coatings News > Paints and Coatings Market > Coating standard: interior decoration materials limit of harmful substances in interior wall coating

    Coating standard: interior decoration materials limit of harmful substances in interior wall coating

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core note: Chapter 3 of this standard is mandatory, and the rest is recommended The limit value of VOC in this standard refers to the ecological standard for paints and varnishes (1999 / 10 / EC), which is the eco mark product of European community The limit value of soluble heavy metals refers to the requirements of UK, Germany, France and European Economic Commission for toxic heavy metals in children's toy materials (bs5665:1989, Dix en71:1989, NF en713, en71:1988) Annex to this standard Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Home of coatings: Chapter 3 of this standard is mandatory, and the rest is recommended The limit value of VOC in this standard refers to the ecological standard for paints and varnishes (1999 / 10 / EC), which is the eco mark product of European community The limit value of soluble heavy metals refers to the requirements of UK, Germany, France and European Economic Commission for toxic heavy metals in children's toy materials (bs5665:1989, Dix en71:1989, NF en713, en71:1988) Appendix A, B and C of this standard are normative Since January 1, 2002, the products produced by the manufacturing enterprises shall comply with the national standards, with a transitional period of 6 months; from July 1, 2002, the market shall stop selling the products that do not meet the national standards This standard is proposed by China Petroleum and Chemical Industry Association This standard is under the jurisdiction of the National Technical Committee for standardization of coatings and pigments This standard is drafted by Changzhou paint Chemical Research Institute of China National Chemical Construction Corporation, environmental health testing institute of Chinese Academy of preventive medicine, Shanghai paint Co., Ltd., Shanghai paint research institute, Sinochem chemical standardization institute, China Paint Industry Association, China Construction Materials Research Institute and China Academy of Building Sciences Participants of this standard: Shanghai Huasheng Chemical Co., Ltd., Nanjing Huacai special paint factory, best paint (Beijing) Co., Ltd., Shanghai COSCO Huili paint Co., Ltd., Libang paint (China) Co., Ltd., domestic mentaegu paint oil (China) Co., Ltd., Zhejiang tiannv group paint Co., Ltd., Shanghai Feihu construction paint Co., Ltd., Shanghai Municipal Academy of building science, Changzhou Houwang coating Co., Ltd., Beijing Fuya coating Co., Ltd Main drafters of this standard: Zhang Junzhi, Zhao Ling, Feng Shifang, Qi Qiping, Wu Guolin, Xu Dongqun, Wang Daozhang, Mei Jian, Huang Dayuan, Wang Jing, Xiong Wei This standard was first issued on December 10, 2001 This standard is entrusted to the National Technical Committee for coating and pigment standardization for interpretation 1 scope this standard specifies the technical requirements, test methods, inspection rules, packaging marks, safety coating and protection of the allowable limits of harmful substances to human body in the wall coating for interior decoration This standard is applicable to water-based wall coating for interior decoration This standard is not applicable to interior wall coating with organic matter as solvent 2 Normative references the clauses in the following documents become the clauses of this standard through the reference of this standard For dated references, all subsequent amendments (excluding the contents of Corrigendum) or revisions are not applicable to this standard However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used For undated references, the latest edition is applicable to this standard GB / T 1250-1989 representation and determination of limit values GB 3186-1982 (1989) sampling of paint products (NEQ ISO 1512:1974) GB / T 6682-1992 specification and test methods for water used in analytical laboratories (NEQ ISO 3696:1987) GB / T 6750-1986 determination of density of paints and varnishes (EQV ISO 2811:1974) GB / T 6751-1986 determination of volatile and non-volatile matter of paints and varnishes (EQV ISO 1515:1973) GB / T 9750-1998 paint product packaging marking GB / T 9758.1-1988 paints and varnishes - Determination of "soluble" metal content - Part 1: Determination of lead content - Flame atomic absorption spectrometric method and dithizone spectrophotometric method (IDT ISO 3856.1:1984) - GB / T 9758.4-1988 paints and varnishes - Determination of "soluble" metal content - Part 4: Determination of cadmium content Flame atomic absorption spectrometry and polarography (IDT iso3856.4:1984) GB / T 9758.6-1988 paints and varnishes - Determination of "soluble" metal content - Part 6: Determination of total chromium content in the liquid part of paints - Flame atomic absorption spectrometry (IDT ISO 3856.6:1984) GB / T 9758.7-1988 paints and varnishes - Determination of "soluble" metal content Part 7: Determination of mercury content in pigment part of paint and liquid part of water thinkable paint flameless atomic absorption spectrometry (IDT ISO 3856.7:1984) 3: the product shall meet the technical requirements of Table 1: the technical requirements of Table 1: the project limit value of volatile organic compounds (VOC) / (g / L) ≤ 200 free formaldehyde / (g / kg) ≤ 0.1 heavy metal / (mg / kg) soluble lead ≤ 90 soluble cadmium ≤ 75 Test method 4.1 for soluble chromium ≤ 60, soluble mercury ≤ 60 4, the sampling products shall be sampled according to the provisions of GB 3186-1982 (1989) The samples are divided into two parts, one is sealed and the other is used as the test sample 4.2 volatile organic compounds (VOC) shall be determined according to Appendix A 4.3 free formaldehyde shall be determined according to Appendix B 4.4 heavy metals (soluble lead, soluble cadmium, soluble chromium and soluble mercury) shall be determined according to Appendix C 5 Inspection rule 5.1 all technical requirements listed in this standard are type inspection items 5.1.1 under normal production, type inspection shall be conducted at least once a year 5.1.2 type inspection shall be carried out at any time under any of the following circumstances: -- when the new product is initially finalized; -- when the product is produced in another place; -- when the production formula, process and raw materials are greatly changed; -- when the production is resumed three months after the shutdown 5.2 determination of test results 5.2.1 the determination of test results shall be conducted according to the rounding value comparison method in GB / T 1250-1989 5.2.2 when the inspection results of all items meet the technical requirements of this standard, the product shall meet the requirements of this standard If one inspection result fails to meet the requirements of this standard, the preserved sample shall be retested If the retest result fails to meet the requirements of this standard, the product does not meet the requirements of this standard 6 Packaging mark the packaging mark of the product shall comply with the provisions of GB / T 9750-1998, and the products passing the inspection according to this standard can be indicated on the packaging mark 7 Safety coating and protection 7.1 ensure good indoor ventilation during coating 7.2 brush coating shall be adopted as far as possible 7.3 construction personnel shall wear necessary protective equipment during painting 7.4 keep indoor air circulation after painting 7.5 before check-in, the room after painting shall be kept empty for a period of time Appendix A (normative appendix) determination of volatile organic compounds (VOC) principle a.1 the content of total volatile compounds in paint minus the moisture content is the content of volatile organic compounds in paint A 2 Determination of total volatile content (V) after the sample is stirred evenly, the total volatile content (V) in the coating is determined according to GB / T 6751-1986, test conditions: (105 ± 2) ` C, maintained for 3h A 3 Determination of water content a.3.1 gas chromatography a.3.1.1 reagent a.3.1.1.1 distilled water (GB / T 6682, grade III water); a.3.1.1.2 anhydrous dimethylformamide (DMF), analytical pure; a.3.1.1.3 anhydrous isopropanol, analytical pure A 3.1.2 instrument a.3.1.2.1 gas chromatograph: equipped with thermal conductivity detector A 3.1.2.2 chromatographic column: stainless steel column with column length of 1m m and outer diameter of 3.2mm, filled with 117 μ m-250 μ m polymer porous microspheres (for programmed temperature rise, the initial temperature of the column is 80 ` C, keep for 5min, the speed of rise is 30 ` C / min, and the final temperature is 170 ` C, keep for 5min; for constant temperature, the column temperature is 140 ` C, after isopropanol is completely discharged, adjust the column temperature to 170 ` C, and wait for DMF peak to be discharged If the test continues, reduce the column temperature to 140 ` C) A 3.1.2.3 recorder A 3.1.2.4 microinjector: 1 μ L or 20 μ L A 3.1.2.5 glass bottle with stopper: 10ml A 3.1.3 test step a.3.1.3.1 measure the response factor R of water, weigh about 0.2g distilled water and 0.2g isopropanol in the same corked glass bottle, accurate to 0.1mg, add 2ml dimethylformamide, mix well, inject 1 μ l standard mixture with micro syringe, and record its chromatogram Calculate the response factor R of water according to the following formula:..................... (a.1) where: - mass of isopropanol, unit: G; - mass of water, unit: G; - peak area of water; - peak area of isopropanol If isopropanol and dimethylformamide are not anhydrous reagents, record the water peak area of the blank with the same amount of isopropanol and dimethylformamide (mixed solution), but no water as the blank Calculate the response factor of water as follows:..................... (A.2) where: R - response factor; - mass of isopropanol, unit: G; - mass of water, unit: G; - peak area of isopropanol; - peak area of water; B - peak area of blank water A 3.1.3.2 for sample analysis, weigh 0.6g and 0.2g isopropanol of the sample after being stirred evenly, accurate to 0.1mg, add them to the glass bottle with stopper, add 2ml dimethylamide, cover the bottle stopper, and prepare a isopropanol and dimethylamide without coating as blank sample Shake the vial containing the sample with force for 15min, place it for 5min to make it precipitate, or use a low-speed centrifuge to make it precipitate Take the supernatant from 1 μ l sample bottle, inject it into the chromatograph, and record the chromatogram Calculate the water content (%) in the paint according to the following formula:..................... (A.3) where: - water peak area; B - water peak area in the blank; - isopropanol peak area; - isopropanol mass, unit: G; - paint mass, unit: G; R -- response factor a.3.2 Karl Fischer a.3.2.1 reagent a.3.2.1.1 distilled water (GB / T 6682 Tertiary water); a.3.2.1.2 Karl Fischer Reagent: select appropriate reagent (for the sample without aldehyde and ketone, the main components of the reagent are iodine, sulfur dioxide, methanol and organic base) For the samples containing aldehydes and ketones, special reagents for aldehydes and ketones shall be used, the main components of which are iodine, imidazole, sulfur dioxide, 2-methoxyethanol, 2-chloroethanol and trichloromethane) A 3.2.2 apparatus a.3.2.2.1 Karl Fischer water titrator; a.3.2.2.2 syringe: 10 μ L; a.3.2.2.3 disposable burette: 3 ml A 3.2.3 test step a.3.2.3.1 calibration of Karl Fischer Reagent add new solvent to the titration bottle to cover the electrode end, and titrate to the end point with Karl Fischer reagent Inhale distilled water with a 10 μ l syringe, inject it into a titration bottle, weigh the water mass with the decrement method, accurate to 0.1mg, and input the water mass into the titrator Titrate with Karl Fischer reagent to the end point, and record the calibration results displayed by the instrument Repeat the calibration until the difference between the two adjacent calibration values is less than 1%, find the average value of at least two determinations, and input the average value of the calibration results into the titrator A 3.2.3.2 disposable sample analysis
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